If anyone is still having trouble with the new SA, this is the best team to pass it imo, no matter what main you are (tho Water main is by far the easiest):x-x-x
Ukon Sakon-Kabuto-Kimimaro
Main-x-x
The reason this team works so well is the curse marks of US and Kimimaro. By the 4th wave where Itachi and Sasuke come, they will be incredibly buffed by Kabuto and enemy attacks. All you have to do is set up the talents depending on your main.
Now, water main has a special bonus in the shape of Reserve Seal, which works like a curse mark and allows her to near one shot Itachi and/or Sasuke. If you take reserve seal I recommend using Monster Strength and Skewering with this setup.
As a downside, a chaosed water main or Ukon Sakon can end up causing massive damage to one of your own team members sometimes.